12187106543 has 4 divisors (see below), whose sum is σ = 12223925928. Its totient is φ = 12150287160.

The previous prime is 12187106513. The next prime is 12187106549. The reversal of 12187106543 is 34560178121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34560178121 = 7 ⋅4937168303.

It is a cyclic number.

It is not a de Polignac number, because 12187106543 - 2²⁰ = 12186057967 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12187106497 and 12187106506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12187106549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18409196 + ... + 18409857.

It is an arithmetic number, because the mean of its divisors is an integer number (3055981482).

Almost surely, 2^12187106543 is an apocalyptic number.

12187106543 is a deficient number, since it is larger than the sum of its proper divisors (36819385).

12187106543 is an equidigital number, since it uses as much as digits as its factorization.

12187106543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36819384.

The product of its (nonzero) digits is 40320, while the sum is 38.

The spelling of 12187106543 in words is "twelve billion, one hundred eighty-seven million, one hundred six thousand, five hundred forty-three".